Table 5.

Between-arm differences on WEMWBS at 12-months post-randomisation with and without accounting for adherence or attendance.

Model (47 family carers within 39 families)	Adjusted mean difference*	Lower 95% CI	Upper 95% CI
Two-level model	3.96	−1.39	9.32
Single-level model†	4.38	−1.02	9.78
IV regression accounting for adherence†	5.05	−0.70	10.79
Maximum efficacy based on family session attendance	5.84	−0.80	12.40
Maximum efficacy based on main family carer attendance	6.84	−0.84	14.53
Maximum efficacy based on main family carer attendance, main family carer responses only (n = 36)	4.85	−3.71	13.41

^*Adjusted for baseline WEMWBS score and site.

^†Cluster robust standard errors account for clustering of participants within families.